How would you go about porting the sealed chamber to peak at a certain frequency ? I have no program that will simulate a 6th order and did try to get winisd, but it doesn't work on vista. GRRR The program I do use it only calcs for 4th order. Which doesn't help to much.

Could someone help me with a port size and depth for a peak tune of 60hz ? I am seriously thinking about building one of these and would like to try it in a trunk car for spl. Right now I use a 4th order and do fairly well with what I have, but need more to be competative.